The thing about the ceiling tiles that I find interesting is that when you compare them to Fletcher's Vulcan outfits, they really look like they tie in (so did Fletcher get his costume ideas from looking through Minor's engineering castoffs, I wonder? Maybe Minor deserves more credit.)
I suspect he got the idea from the Vulcan sets (Yellowstone and Paramount) and not from the engine room. Minor also visualized the Vulcan sets, but who knows if he suggested using the tiles?
I have an email in to Bob Burns about some of this stuff.